How to get the indices from a matrix and apply it to vectors?

I have a matrix of wind speeds that is 80 x 160. I also have vectors of latitudes (80x1) and longitudes (160x1). I want to be able to find high wind speeds in the matrix and then also use those indices to get the latitudes and longitudes. How could I go about this?

[the cyclist]

Exactly what you want to do is not clear to me.

Suppose you had this smaller, 3x5 matrix instead (and associated lat/long):

rng default

lat  = rand(3,1);
long = rand(5,1);
wind = rand(3,5)

wind = 3×5

0.9575 0.9706 0.8003 0.9157 0.6557 0.9649 0.9572 0.1419 0.7922 0.0357 0.1576 0.4854 0.4218 0.9595 0.8491

Which "high wind speeds" do you want?

[Shayma Al Ali]

So in my matrix, the wind speeds range from 2 to 20 m/s. I want to get the wind speeds that are greater than 15 m/s. I also want to get the lats and lons of those wind speeds that are greater than 15 m/s.

Answer 1

[the cyclist]

Here is how you can do that, using my small example:

rng default

HIGH_WIND = 0.96; % <------ CHANGE THIS TO 15

lat  = rand(3,1);
long = rand(5,1);
wind = rand(3,5);

high_wind = wind(wind>0.96);

[high_wind_lat_idx, high_wind_long_idx] = find(wind>HIGH_WIND);

high_wind_lat  = lat(high_wind_lat_idx);
high_wind_long = long(high_wind_long_idx);